Concept:The term "Sahihayn" is an Arabic plural meaning "the two authentic books" of hadith.
It refers specifically to two internationally accepted collections of prophetic traditions.
Explanation:The two books known as Sahihayn are Sahih al-Bukhari and Sahih Muslim.
Sahih al-Bukhari was compiled by Abu Abdullah Muhammad ibn Ismail al-Bukhari.
Sahih Muslim was compiled by Abul Husayn Muslim ibn al-Hajjaj.
These two collections are unanimously regarded by Muslim scholars as the most authentic works after the Quran.
Compilations made by Imam Malik, Ibn Hanbal, At-Tirmidhi, An-Nasa'i, Abu Dawud, and Ibn Majah do not come under the name Sahihayn.
Thus, the correct pairing of the two compilers is present only in option A.
Answer:A. Bukhari and Muslim